Mutual insurance companies may only borrow to finance the development of insurance activities or to strengthen their solvency margin, in the case of undertakings referred to in Article L. 310-3-2, or their eligible own funds, in the case of undertakings referred to in Article L. 310-3-1, and in accordance with the terms and conditions defined by Articles R. 322-78 to R. 322-80-1, subject to the provisions of Article R. 322-105.